Memory use

Hi all.


I'm working with Satellite Images, and I'm using visad to visualizate
them.  I need that visad use less memory, then I try to construct the
FlatField in this way:

new FlatField( func_domain_range, domain_set,null,null,new Integer1DSet[]
{new Integer1DSet(varRaster,255)},null);

but it spend more memory that in this way:

new FlatField( func_domain_range, domain_set,null,null,null,null);

Why the first one use more memory?

Thank's

--
Olver Hernández
Facultad de Minas
Universidad Nacional de Colombia
Sede Medellín